“You’ve got to have that type of mental ego against a juggernaut. You go against the best, a lot of series are won on fear factor, like, or non-belief. When you have that non-belief, then you have no chance,” Pierce said after practice.

“What I try to do in this locker room, or with my teammates, is just try to give them belief that we can beat this team. They’re not unbeatable.”

Miami had been unstoppable heading into Game 3. The Heat had been undefeated in these playoffs until the Nets’ 104-90 victory on Saturday night. Miami hadn’t even faced a fourth-quarter deficit, but was out of the game long before then after Brooklyn dominated the third quarter to build a huge lead.

“The defeat was complete,” Heat coach Erik Spoelstra said. “It was both sides of the basketball.

“It was like trying to plug in holes in a leaking dam. There was so many things that were not in our favor really on both ends of the court.”

The Nets made 15 of 25 3-point attempts, outrebounded Miami 43-27, and limited LeBron James to two baskets over the final three quarters after he had 16 points on 6-of-7 shooting in the first.

Brooklyn swept the regular-season series, though none of the games was anywhere near as easy as Game 3. Yet the four victories gave the Nets a confidence against the Heat that some other opponents may not have.

“We just had a little success against them during the regular season. We played them well and we feel like we match up well with them,” Nets guard Deron Williams said. “And if we’re on top of our game, we’re playing defense the way we’re capable of playing, like we did the last game, we put ourselves in a good position to win.”

Pierce did his part after the Nets were routed in Game 1, asking coach Jason Kidd to switch up the defense so he could guard James. And after he and the Nets did such a good job of it over the final three quarters of Game 3, Pierce said the Nets wanted to show the Heat that they weren’t scared of them.

“Why should it be a fear factor?” James said. “It’s just basketball. We’re not trying to win a war here, it’s just basketball. That’s all it is. We’re all grown men, who cares about who’s fearing who?

“We’ve never been a team that talks. We don’t get into that, and we’ve never been a bulletin board team. We just want to play the game the right way and we give ourselves a good chance to win if we play our type of basketball and last night we didn’t do that.”

Miami had won its previous eight postseason games and followed every loss with a victory last year. To do that in this series, Spoelstra said the Heat would not only need better effort and urgency, but also more attention to the little details.

Pierce is expecting that, as well as in Game 5 back in Miami on Wednesday night. Even though the Heat didn’t look it Saturday, he believes they are just as good as the recent versions that ended his seasons in Boston.

“Definitely. They’re well-seasoned now. They know how to win,” Pierce said. “They’ve won two championships, there’s nothing they haven’t been through. So the one thing you always hear, it’s kind of a cliche, is never underestimate the heart of a champion, and you know that’s what they have under their belts. So you know, they’re the team to beat.”